CVE-2022-39298Network attack vector

Unauthenticated PHP code execution via object deserialization

Published Oct 12, 2022 · Updated Apr 23, 2025

Deserialization in MelisFront 5.0.0 and earlier allows remote attackers to execute arbitrary PHP code through crafted plugin configuration. The getPluginAction method twice HTML-decodes pluginHardcodedConfig from an HTTP POST request, then passes it to PHP unserialize without prohibiting object classes. No authentication or user interaction is required, and successful object injection executes PHP code with the web application's privileges.

CVSS severity7.7
High
EPSS probability1.02%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Deserialization in MelisFront 5.0.0 and earlier allows remote attackers to execute arbitrary PHP code through crafted plugin configuration. The getPluginAction method twice HTML-decodes pluginHardcodedConfig from an HTTP POST request, then passes it to PHP unserialize without prohibiting object classes. No authentication or user interaction is required, and successful object injection executes PHP code with the web application's privileges.

The record

CVE
CVE-2022-39298
Published
Oct 12, 2022
Updated
Apr 23, 2025
Vendor
Melis Technology
Product
MelisFront
Classifications
CWE-502, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 12, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=<= 5.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Melis Technology · MelisFrontversion=<= 5.0.0

Published CVSS scores

7.7GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L
9.8NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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